Decoherent histories approach to tunneling times and its implication

概要

論文の詳細を見る
Decoherent histories approach to quantum mechanics assigns probabilities toevents that are not restricted to a single moment of time, provided that the decoherencecondition holds for the set of events. The condition is however hardly satisfied in general,which has been considered to limit the usefulness of the histories approach. The presentpaper applies the histories approach to the tunneling time problem to show that, althoughthe decoherence condition does not hold, the histories approach is still useful in predicting thecentral tendency and the dispersion of resident times. We consider such quantities that wouldbecome the average and the standard deviation of resident times if the decoherence conditionheld. Since the condition does not actually hold, they are not regarded as the true average andthe true standard deviation. Nevertheless, a quantum clock approach allows us to interpretthese quantities as a central value and a dispersion of resident times within the time resolutionof the clock.
Institute of Physics Publishingの論文